A process for preparation of agrichemical granules comprising: addition of aqueous liquid to a rapidly mixing powder composition comprising a carrier including a hydratable calcium sulfate, to form a pliable moist mixture with rapid mixing wherein the aqueous liquid is added in an amount of at least 5 wt% water by weight of the moist mixture composition; and shaping the pliable moist mixture, preferably comprising extrusion or pelletisation, to form granules.